PURGE/PRESSURIZATION SYSTEM

PROCESS AUTOMATION PURGE/PRESSURIZATION SYSTEM DATA SHEETS

Systems ( Series) 2001A: Class I Volumes 2 ft 3 and Class II Volumes 10 ft 3...3 2001B: Class II Volumes 50 ft 3...7 2001C: Class II Volumes 250 ft 3...11 2002: Class I Volumes 15 ft 3...15 2003: Class I Volumes 75 ft 3...19 2004: Class I Volumes 200 ft 3...23 2005: Class I Volumes 450 ft 3...37 Accessories...31 2

Class I ( 2 ft 3 ) and Class II ( 10 ft 3 ) Description Model 2001A is a pressurization or purging system that operates on a supply of compressed instrument air or inert gas. It regulates and monitors pressure within sealed (protected) enclosure(s), in order to prevent combustible dust accumulation or remove and prevent flammable gas or vapor accumulations. In Class II areas, the system maintains a "safe" (1.0") pressure. In Class I areas, the system accomplishes four air exchanges and maintains a "safe" (0.25") pressure. In addition, the system includes an electrical power control unit (EPCU) that monitors system operation and controls enclosure power. All start-up requirements must be satisfied before the EPCU will energize power to the enclosure(s). These processes reduce the hazardous (classified) area rating within the enclosure(s), in accordance with the NEC - NFPA 70, Article 500, NFPA 496 and ISA 12.4. Basic Operation In accordance with system instructions, start-up requires the air supply to be engaged and EPCU power to be energized. In Class II areas, all dust must be removed from the enclosure(s). The enclosure protection vent (if used) must be tested and enclosure(s) must be sealed. The EPCU power control switch must be activated and the system will self-test. The enclosure pressure control regulator is then used to set a safe reading on the enclosure pressure gauge. In Class II areas, power will energize shortly after safe pressure is stable. In Class I areas, the system must perform an exchange cycle (determined by the safe pressure flow rate five minutes minimum) before power can be energized. Loss of safe pressure causes the EPCU to deenergize power to the protected enclosure(s). All systems include form "C" contacts for audible or visual alarm systems. Model 2001A STD Style (Standard) Standard Model Applications Model Number: 2001A-CI Designation: Purging System Volume: 2 ft 3 max. UL & FM Certified: Cl. I, Div. 1, Group C&D* Rating Reduction: Div. 1 to Nonhazardous Model Number: 2001A-CII Designation: Pressurization System Volume: 10 ft 3 max. UL & FM Certified: Cl. II, Div. 1, Group E-G Rating Reduction: Div. 1 to Nonhazardous *Only FM Certified Group B System Available 3

Reference Inlet Gauge EPCU Reference Tubing System Supply Inlet Regulator Supply Outlet Mounting Plate Flame Arrestor Fitting STD Style Venturi Orifice CONNECTION POINTS SHOWN ABOVE IN BOLD TEXT ON SYSTEM DIAGRAM Regulator Body: Regulator Handle: Gauge: Tube Fittings: Tubing: System Nameplates: Fastener Hardware: Mounting Plate: EPCU Body: Warning Nameplate: Material Specifications Lexan is a registered trademark of the General Electric Corporation Zinc w/enamel Finish Polycarbonate Alum. w/enamel Finish 316 SS Forged Body 316 SS 1/4".035 Welded Silkscreened Lexan & SS SS Screws & Bolts 316 14 Ga #3 Brush SS Bead Blast Cast Alum. Silkscreened SS System Specifications System Dimensions: See page 6 Shipping Weight: 38 lb Temp. Range: -20 F to +120 F Supply Range: * 5-120 psi max. Supply Requirements: Clean air or inert gas Safe Press. Setpoint (CI/CII): 0.25"/1.0" Safe Press. Flow Rate: ** 0.1-3.5 SCFH Class I Exchange Time: *** As required System Supply Port: 1/4" Tube Fitting Supply Fitting: 1/4" Tube Fitting Reference Fitting: 1/4" Tube Fitting EPCU Conduit Port Size: 1/2" FPT EPCU Power Requirements: 120 VAC 60 Hz 1Ø (European 240 voltage only) 240 VAC 50 Hz 1Ø (All voltage ratings are factory set) EPCU Power Consumption: 500 ma Power Contacts: 20 A @ 240 VAC 20 A @ 28 VDC **** 20 A @ 48 VDC Alarm N.O. Contact: 20 A @ 240 VAC 20 A @ 28 VDC Alarm N.C. Contact: 15 A @ 240 VAC 10 A @ 2 VDC * With EPV-1 Vent - 120 psi max. to 5 psi min. Systems installed without Vent must be equipped with tamper proof regulator set to 5 psi max. ** integrity determines actual flow rate *** Time required to exchange 4 volumes within the enclosure(s), based on actual measured safe pressure flow rate or 5 minutes, whichever is greater Simplified EPCU Logic Diagram OPERATION Signal (1) from SPS is sent to µp, GAL and SPCR coil. During start-up, GAL verifies all µp functions. GAL & µp must receive uninterrupted signal from SPS to prevent logic resetting. After GAL verifies all start-up procedures, it sends "power enabled" signal (2) to PER coil. Then, µp sends "power request" signal (3) through the SPCR and PER contacts to EPR coils. SPS (1) GAL CLK FAIL PRC µp (2) PER SPCR (3) Electrical Wiring Diagram Field Wired Power Module Terminals EPCU Power Supply Terminals 120 VAC 240 VAC (Optional Voltage) EPR EPR SPS - Safe GAL - Gate Array Logic µp - Microprocessor PER - Power Enabled SPCR - Safe pressure confirmation relay EPR - Power 1 2 3 4 5 6 7 8 9 10 Gnd Gnd Hot Hot 20 A FUSES Neu Neu Isolated Power s Isolated Alarm In Out In Out Power Supply NO Com NC Terminals Remote Alarm Terminals EPCU Description The Pepperl+Fuchs Series EPCU is a factory programmed, field adjustable, microprocessor controlled unit featuring full status indication, redundant gate array logic and electromechanical relays. The EPCU is constructed from four major items: (1) a power module, (2) a pressure switch module, (3) a logic module and (4) a power mode selector switch. The sections are linked with polarized cable, and the boards are stacked in the EPCU enclosure on standoffs. Basic EPCU Operation When power is "off", the EPCU is at rest, alarm and power relays are deenergized, and the LED display is off. When power is switched "on", the EPCU performs a self-test of LED display and logic functions. The unit will then start-up. Class II units must detect a 0.50" pressure to energize the alarm relay. The enclosure power relays energize after a brief delay. Class I units must detect a 0.25" pressure to energize the alarm relay and begin an exchange cycle. When the cycle stops, the power relays will energize. Loss of safe pressure on either unit causes alarm and power relays to deenergize (see power control options for more information regarding EPCU operation). 4

Barrier Fault & Active Status Indicators Barrier C Barrier B Barrier A Barrier Wiring Terminal Calibration Access EPCU Logic Module Primary Microprocessor LED Status Display Controller (GAL) Factory Programming Power Module Cable EDT, SLT & RET Timers EPCU Features LED DISPLAY INDICATORS Power Off: Red Power s Deenergized Power On: Green Power s Energized Safe : Blue > 0.15" or 0.50" w.c. Timer Running: Yellow Exchange Timer Active - Class I Only Alarm Active: Red < 0.15" or 0.50" w.c. Bypass Engaged: Green Control Bypass Active - CB Modes Class I LED Displays EPCU Module Primary Safe Space for Optional Safe Alarm Only Class II LED Displays Alarm & Bypass Isolated Coil Voltage Transformer Voltage Input Selector (factory set for 120 or 240 VAC power) Input Fuse RESV RESV Factory Wiring Terminal 120/240 VAC EPCU Power Module Power Control Cable 20 A Power Fuse Power Module Wiring Terminal Assembled Electrical Power Control Unit Voltage Regulators Cable Logic Module Cable Safe 20 A Alarm 20 A Power s Alarm Only Alarm & Bypass FIELD ADJUSTABLE TIMER FUNCTIONS RET (Rapid Exchange Timer) provides a time delay after safe pressure is detected, to allow four volume exchanges prior to energizing the enclosure power relays. In Class I areas only, if safe pressure is lost during time delay cycle, EPCU will reset. NOTE: EDT & SLT timers not functional on Series 2001 Systems Power Control Options NORMAL RUNNING (NR) MODE EPCU features an on-off pushbutton power control switch to activate control functions. must be depressed to initiate start-up. After completion of start-up, safe pressure must be lost or switch must be depressed to deenergize enclosure power relays. CONDITIONAL BYPASS (CB) MODE EPCU features an off-on-bypass power control switch to activate control functions. must be set to "on" position to initiate start-up. After enclosure power is energized, safe pressure must be lost or switch must be set to "off" position to deenergize enclosure power. After enclosure power is energized, switch may be set to "bypass" position to temporarily latch enclosure power relays. A flashing LED then indicates bypass engaged, and the enclosure can then be accessed without deenergizing power (performed under specific conditions). Following access, safe pressure must be reestablished to resume normal operation. At that time, the switch may be reset to the "on" position without disruption of enclosure power. Alarm relay normally deenergizes only upon loss of safe pressure, but can be programmed to deenergize when bypass is engaged, if specified at time of order. 5

System Accessories Diagram Model Number Designations 2001A - STD - CI - NR - LH - ## 1/4" Supply Tubing 1/4" Tubing Reference Supply Fitting EBC-4 Reference Fitting EFC-4 Protection Vent EPV-1-SA... (EPV vent not required when using the TR-10G tamper proof regulator as redundancy) Pressurized Protected Mounting Kit SMK-2 or SMK-3 Warning Nameplate EWN- (Included with Panel) Series Model Number System Style STD - Standard Area Classification CI - Class I, Group C & D Area CII - Class II, Group E, F & G Area IB - Class I, Group B Area Power Control Mode NR - Normal Running CB - Conditional Bypass Mounting Configuration LH - left hand left side of enclosure RH - right hand right side of enclosure TM - top mount top of enclosure BM - bottom mount bottom of enclosure WM - wall mount wall surface FM* - frame mount external frame or rack PM* - panel mount enclosure surface cutout * FM & PM configurations feature flush mount EPCU. Flush mount EPCU is not suitable for Group B Area. ## - See Accessories Page 132 for additional factory installed accessories OPTIONAL INTRINSIC SAFETY BARRIERS DESCRIPTION & OPERATION The EPCU Logic Module can accommodate up to three intrinsic safety barriers to interact with remote devices and affect operation of the EPCU. The barriers are installed and programmed by the factory at time of order, and they are designed to function either in conjunction with a customer furnished switch and a Pepperl+Fuchs furnished resistor network cable, or a Pepperl+Fuchs furnished proximity detector. Each barrier develops a low power signal to create a two-wire closed-loop circuit. Operational status of each barrier is indicated by a green LED to show active (closed switch) status, and by a red LED to show faulted (line breakage) cable status. All barriers can be reprogrammed to duplicate other barrier functions as required, upon specific request. BARRIER PROGRAMMING OPTIONS Barrier A Function - when switch opens Disables start-up cycle Deenergizes enclosure power and alarm relay Functions parallel to safe pressure switch Barrier B Function - when switch opens Not programmed - custom applications only Barrier C Function - when switch closes Energizes RESV relay - custom applications only Model 2001A System Accessories (See accessories page for complete details) CONNECTION FITTINGS EFC-4 1/4" Flush Connector EBC-4 1/4" Bulkhead Connector EPC-10 1/2" Pipe Connector ADDITIONAL ITEMS LLF 1/4" Filter SMK-2, -3 or -10 System Mounting Kit RAH Remote Alarm Horn RAB-1 Div. 1 Remote Alarm Beacon LCK L Fitting Conduit Kit TCK T Fitting Conduit Kit SRM-4000 Resistor Module NJ... P+F Namur Sensor INSTALLATION & OPERATION MANUAL 129-0208 Inst. & Operation Manual OPTIONAL ENCLOSURE PROTECTION VENTS EPV-1-SA-00 Straight w/spark Arrestor EPV-1-SA-90 Rt Angle w/spark Arrestor OPTIONAL HEX KEY REGULATOR HANDLE TR-10G Tamper Proof Regulator WARNING NAMEPLATES EWN-1 Class I Warning EWN-2 Class II Warning ETW Temperature Warning FACTORY INSTALLED ACCESSORIES IS1 Channel A Barrier IS2 Channel B Barrier IS3 Channel C Barrier RP1 Safe L Power Key Lock Assembly ONE (1) ENCLOSURE WARNING NAMEPLATE & ONE (1) INSTALLATION & OPERATION MANUAL ARE PROVIDED WITH EACH SYSTEM Overall System Dimensions ` STD Height Width Depth LH - left hand 20 11 10.50 RH - right hand 20 11 10.50 TM - top mount 10.50 20.75 10.50 BM - bottom mount 10.50 20.75 10.50 WM - wall mount 20 11 12.50 FM or PM - flat panel 22 13 11.25 Dimensions in inches. Mounting dimensions available upon request. FM & PM panel cutout dimensions: 21h x 12w Height & width dimensions reflect mounting plate measurements. Depth dimension reflects overall measurement of system, including components. 6

Class II ( 50 ft 3 ) Description Model 2001B is a pressurization system that operates on a supply of compressed instrument air or inert gas. It regulates and monitors pressure within sealed (protected) enclosure(s), in order to prevent combustible dust accumulation. Intended exclusively for Class II areas, the system is designed to maintain a "safe" (1.0") pressure. In addition, the system includes an electrical power control unit (EPCU) that monitors system operation and controls enclosure power. All start-up requirements must be satisfied before the EPCU will energize power to the enclosure(s). This process reduces the hazardous (classified) area rating within the enclosure(s), in accordance with the NEC - NFPA 70, Article 500, NFPA 496 and ISA 12.4. Model 2001B Basic Operation In accordance with system instructions, start-up requires the air supply to be engaged and EPCU power to be energized. The operator is then required to remove all dust from the protected enclosure(s). The enclosure protection vent (if used) must be tested and enclosure(s) must be sealed. The EPCU power control switch must be activated and the system will self-test. The enclosure pressure control regulator is used to set a safe reading on the enclosure pressure gauge. The enclosure power will energize after a brief pause, when safe pressure is stable. Loss of safe pressure causes the EPCU to deenergize power to the protected enclosure(s). The system includes form "C" contacts for audible or visual alarm systems. STD Style (Standard) Standard Model Applications Model Number: Designation: Volume: UL & FM Certified: Rating Reduction: 2001B-CII Pressurization System 50 ft 3 max. Cl. II, Div. 1, Group E-G Div. 1 to Nonhazardous 7

Reference Inlet Gauge EPCU Reference Tubing Regulator Body: Regulator Handle: Gauge: Tube Fittings: Tubing: System Nameplates: Fastener Hardware: Mounting Plate: EPCU Body: Warning Nameplate: STD Style Material Specifications System Supply Inlet Lexan is a registered trademark of the General Electric Corporation Regulator Supply Outlet Mounting Plate Flame Arrestor Fitting Venturi Orifice CONNECTION POINTS SHOWN ABOVE IN BOLD TEXT ON SYSTEM DIAGRAM Electrical Wiring Diagram Zinc w/enamel Finish Polycarbonate Alum. w/enamel Finish 316 SS Forged Body 316 SS 1/4".035 Welded Silkscreened Lexan & SS SS Screws & Bolts 316 14 Ga #3 Brush SS Bead Blast Cast Alum. Silkscreened SS Simplified EPCU Logic Diagram OPERATION Signal (1) from SPS is sent to µp, GAL and SPCR coil. During start-up, GAL verifies all µp functions. GAL & µp must receive uninterrupted signal from SPS to prevent logic resetting. After GAL verifies all start-up procedures, it sends "power enabled" signal (2) to PER coil. Then, µp sends "power request" signal (3) through the SPCR and PER contacts to EPR coils. Field Wired Power Module Terminals SPS (1) GAL CLK FAIL PRC µp (2) PER SPCR (3) EPR EPR SPS - Safe GAL - Gate Array Logic µp - Microprocessor PER - Power Enabled SPCR - Safe pressure confirmation relay EPR - Power 20 A FUSES Isolated Power s Isolated Alarm 1 2 3 4 5 6 7 8 9 10 System Specifications System Dimensions: See page 10 Shipping Weight: 38 lb Temp. Range: -20 F to +120 F Supply Range: * 5-120 psi max. Supply Requirements: Clean air or inert gas Safe Press. Setpoint: 1.0" @ Safe Press. Safe Press. Flow Rate: ** 0.1-3.5 SCFH System Supply Port: 3/8" Tube Fitting Supply Fitting: 3/8" Tube Fitting Reference Fitting: 1/4" Tube Fitting EPCU Conduit Port Size: 1/2" FPT EPCU Power Requirements: 120 VAC 60 Hz 1Ø (European 220 voltage only) 240 VAC 50 Hz 1Ø (All voltage ratings are factory set) EPCU Power Consumption: 500 ma Power Contacts: 20 A @ 240 VAC 20 A @ 28 VDC *** 20 A @ 48 VDC Alarm N.O. Contact: 20 A @ 240 VAC 20 A @ 28 VDC Alarm N.C. Contact: 15 A @ 240 VAC 10 A @ 28 VDC * With EPV-3 Vent - 120 psi max. to 5 psi min. Systems installed without Vent must be equipped with tamper proof regulator set to 5 psi max. ** integrity determines actual flow rate EPCU Description The Pepperl+Fuchs Series EPCU is a factory programmed, field adjustable, microprocessor controlled unit featuring full status indication, redundant gate array logic and electromechanical relays. The EPCU is constructed from four major items: (1) a power module, (2) a pressure switch module, (3) a logic module and (4) a power mode selector switch. The sections are linked with polarized cable, and the boards are stacked in the EPCU enclosure on standoffs. Basic EPCU Operation When power is "off", the EPCU is at rest, alarm and power relays are deenergized, and the LED display is off. When power is switched "on", the EPCU performs a self-test of LED display and logic functions. The unit will then start-up. Class II units must detect a 0.50" pressure to energize the alarm relay. The enclosure power relays energize after a brief delay. Loss of safe pressure on the unit causes alarm and power relays to deenergize (see power control options for more information regarding EPCU operation). EPCU Power Supply Terminals 120 VAC 240 VAC (Optional Voltage) Gnd Gnd Hot Hot Neu Neu In Out In Out Power Supply NO Com NC Terminals Remote Alarm Terminals 8

Barrier Fault & Active Status Indicators Barrier C Barrier B Barrier A Barrier Wiring Terminal Calibration Access EPCU Logic Module Primary Microprocessor LED Status Display Controller (GAL) Factory Programming Power Module Cable EDT, SLT & RET Timers EPCU Features LED DISPLAY INDICATORS Power Off: Red Power s Deenergized Power On: Green Power s Energized Safe : Blue > 0.50" w.c. Alarm Active: Red < 0.50" w.c. Bypass Engaged: Green Control Bypass Active - CB Modes Class II LED Displays EPCU Module Primary Safe Space for Optional Safe Alarm Only Alarm & Bypass FIELD ADJUSTABLE TIMER FUNCTIONS RET, EDT & SLT timers not functional on Model 2001B Systems Power Control Options Isolated Coil Voltage Transformer Voltage Input Selector (factory set for 120 or 240 VAC power) Input Fuse RESV RESV Factory Wiring Terminal 120/240 VAC EPCU Power Module Power Control Cable 20 A Power Fuse Power Module Wiring Terminal Voltage Regulators Cable Logic Module Cable Safe 20 A Alarm 20 A Power s NORMAL RUNNING (NR) MODE EPCU features an on-off pushbutton power control switch to activate control functions. must be depressed to initiate start-up. After completion of start-up, safe pressure must be lost or switch must be depressed to deenergize enclosure power relays. CONDITIONAL BYPASS (CB) MODE EPCU features an off-on-bypass power control switch to activate control functions. must be set to "on" position to initiate start-up. After enclosure power is energized, safe pressure must be lost or switch must be set to "off" position to deenergize enclosure power. After enclosure power is energized, switch may be set to "bypass" position to temporarily latch enclosure power relays. A flashing LED then indicates bypass engaged, and the enclosure can be accessed without deenergizing power (performed under specific conditions). Following access, safe pressure must be reestablished to resume normal operation. At that time, the switch may be reset to the "on" position without disruption of enclosure power. Alarm relay normally deenergizes only upon loss of safe pressure, but can be programmed to deenergize when bypass is engaged, if specified at time of order. Assembled Electrical Power Control Unit 9

System Accessories Diagram Model Number Designations 2001B - STD - CII - NR - LH - ## 3/8" Supply Tubing 1/4" Tubing Reference Supply Fitting EBC-6 Reference Fitting EFC-4 Protection Vent EPV-3-SA... Pressurized Protected Mounting Kit SMK-2 or SMK-3 Warning Nameplate EWN-2 (Included with Panel) Series Model Number System Style STD - Standard Area Classification CII - Class II, Group E, F & G Area Power Control Mode NR - Normal Running CB - Conditional Bypass Mounting Configuration LH - left hand left side of enclosure RH - right hand right side of enclosure TM - top mount top of enclosure BM - bottom mount bottom of enclosure WM - wall mount wall surface FM* - frame mount external frame or rack PM* - panel mount enclosure surface cutout * FM & PM configurations feature flush mount EPCU. ## - See Accessories Page 132 for additional factory installed accessories OPTIONAL INTRINSIC SAFETY BARRIERS DESCRIPTION & OPERATION The EPCU Logic Module can accommodate up to three intrinsic safety barriers to interact with remote devices and affect operation of the EPCU. The barriers are installed and programmed by the factory at time of order, and they are designed to function either in conjunction with a customer furnished switch and a Pepperl+Fuchs furnished resistor network cable, or a Pepperl+Fuchs furnished proximity detector. Each barrier develops a low power signal to create a two-wire closed-loop circuit. Operational status of each barrier is indicated by a green LED to show active (closed switch) status, and by a red LED to show faulted (line breakage) cable status. All barriers can be reprogrammed to duplicate other barrier functions as required, upon specific request. BARRIER PROGRAMMING OPTIONS Barrier A Function - when switch opens Disables start-up cycle Deenergizes enclosure power and alarm relay Functions parallel to safe pressure switch Barrier B Function - when switch opens Not programmed - custom applications only Barrier C Function - when switch closes Energizes RESV relay - custom applications only Model 2001B System Accessories (See accessories page for complete details) CONNECTION FITTINGS EFC-4 1/4" Flush Connector EFC-6 3/8" Flush Connector EBC-6 3/8" Bulkhead Connector EPC-13 1" Pipe Connector ADDITIONAL ITEMS SMK-2, -3 or -10 System Mounting Kit RAH Remote Alarm Horn RAB-1 Div. 1 Remote Alarm Beacon LCK L Fitting Conduit Kit TCK T Fitting Conduit Kit SRM-4000 Resistor Module NJ... P+F Namur Sensor INSTALLATION & OPERATION MANUAL 129-0209 Inst. & Operation Manual OPTIONAL ENCLOSURE PROTECTION VENTS EPV-3-SA-00 Straight w/spark Arrestor EPV-3-SA-90 Rt Angle w/spark Arrestor WARNING NAMEPLATES EWN-2 Class II Warning ETW Temperature Warning FACTORY INSTALLED ACCESSORIES IS1 Channel A Barrier IS2 Channel B Barrier IS3 Channel C Barrier RP1 Safe L Power Key Lock Assembly ONE (1) ENCLOSURE WARNING NAMEPLATE & ONE (1) INSTALLATION & OPERATION MANUAL ARE PROVIDED WITH EACH SYSTEM Overall System Dimensions ` STD Height Width Depth LH - left hand 20 11 10.75 RH - right hand 20 11 10.75 TM - top mount 10.50 20.75 10.75 BM - bottom mount 10.50 20.75 10.75 WM - wall mount 20 11 12.50 FM or PM - flat panel Dimensions in inches. Mounting dimensions available upon request. FM & PM panel cutout dimensions: 21h x 12w Height & width dimensions reflect mounting plate measurements. Depth dimension reflects overall measurement of system, including components. 22 13 11.50 10

Class II ( 250 ft 3 ) Description Model 2001C is a pressurization system that operates on a supply of compressed instrument air or inert gas. It regulates and monitors pressure within sealed (protected) enclosure(s), in order to prevent combustible dust accumulation. Intended exclusively for Class II areas, the system is designed to maintain a "safe" (1.0") pressure. In addition, the system includes an electrical power control unit (EPCU) that monitors system operation and controls enclosure power. All start-up requirements must be satisfied before the EPCU will energize power to the enclosure(s). This process reduces the hazardous (classified) area rating within the enclosure(s), in accordance with the NEC - NFPA 70, Article 500, NFPA 496 and ISA 12.4. Model 2001C Basic Operation In accordance with system instructions, start-up requires the air supply to be engaged and EPCU power to be energized. The operator is then required to remove all dust from the protected enclosure(s). The enclosure protection vent (if used) must be tested and enclosure(s) must be sealed. The EPCU power control switch must be activated and the system will self-test. The enclosure pressure control regulator is used to set a safe reading on the enclosure pressure gauge. The enclosure power will energize after a brief pause, when safe pressure is stable. Loss of safe pressure causes the EPCU to deenergize power to the protected enclosure(s). The system includes form "C" contacts for audible or visual alarm systems. STD Style (Standard) Standard Model Applications Model Number: Designation: Volume: UL & FM Certified: Rating Reduction: 2001C-CII Pressurization System 250 ft 3 max. Cl. II, Div. 1, Group E-G Div. 1 to Nonhazardous 11

Reference Inlet Gauge EPCU Reference Tubing Regulator Body: Regulator Handle: Gauge: Tube Fittings: Tubing: System Nameplates: Fastener Hardware: Mounting Plate: EPCU Body: Warning Nameplate: STD Style Material Specifications Lexan is a registered trademark of the General Electric Corporation System Supply Inlet Regulator Supply Outlet Mounting Plate Flame Arrestor Fitting Venturi Orifice CONNECTION POINTS SHOWN ABOVE IN BOLD TEXT ON SYSTEM DIAGRAM Electrical Wiring Diagram Zinc w/enamel Finish Polycarbonate Alum. w/enamel Finish 316 SS Forged Body 316 SS 1/4".035 Welded Silkscreened Lexan & SS SS Screws & Bolts 316 14 Ga #3 Brush SS Bead Blast Cast Alum. Silkscreened SS Simplified EPCU Logic Diagram OPERATION Signal (1) from SPS is sent to µp, GAL and SPCR coil. During start-up, GAL verifies all µp functions. GAL & µp must receive uninterrupted signal from SPS to prevent logic resetting. After GAL verifies all start-up procedures, it sends "power enabled" signal (2) to PER coil. Then, µp sends "power request" signal (3) through the SPCR and PER contacts to EPR coils. Field Wired Power Module Terminals SPS (1) GAL CLK FAIL PRC µp (2) PER SPCR (3) EPR EPR SPS - Safe GAL - Gate Array Logic µp - Microprocessor PER - Power Enabled SPCR - Safe pressure confirmation relay EPR - Power 20 A FUSES Isolated Power s Isolated Alarm 1 2 3 4 5 6 7 8 9 10 System Specifications System Dimensions: See page 14 Shipping Weight: 38 lb Temp. Range: -20 F to +120 F Supply Range: * 5-120 psi max. Supply Requirements: Clean air or inert gas Safe Press. Setpoint: 1.0" @ Safe Press. Safe Press. Flow Rate: ** 0.1-3.5 SCFH System Supply Port: 1/2" Tube Fitting Supply Fitting: 1/2" Tube Fitting Reference Fitting: 1/4" Tube Fitting EPCU Conduit Port Size: 1/2" FPT EPCU Power Requirements: 120 VAC 60 Hz 1Ø (European 220 voltage only) 240 VAC 50 Hz 1Ø (All voltage ratings are factory set) EPCU Power Consumption: 500 ma Power Contacts: 20 A @ 240 VAC 20 A @ 28 VDC *** 20 A @ 48 VDC Alarm N.O. Contact: 20 A @ 240 VAC 20 A @ 28 VDC Alarm N.C. Contact: 15 A @ 240 VAC 10 A @ 28 VDC * With EPV-4 Vent - 120 psi max. to 5 psi min. Systems installed without Vent must be equipped with tamper proof regulator set to 5 psi max. ** integrity determines actual flow rate EPCU Description The Pepperl+Fuchs Series EPCU is a factory programmed, field adjustable, microprocessor controlled unit featuring full status indication, redundant gate array logic and electromechanical relays. The EPCU is constructed from four major items: (1) a power module, (2) a pressure switch module, (3) a logic module and (4) a power mode selector switch. The sections are linked with polarized cable, and the boards are stacked in the EPCU enclosure on standoffs. Basic EPCU Operation When power is "off", the EPCU is at rest, alarm and power relays are deenergized, and the LED display is off. When power is switched "on", the EPCU performs a self-test of LED display and logic functions. The unit will then start-up. Class II units must detect a 0.50" pressure to energize the alarm relay. The enclosure power relays energize after a brief delay. Loss of safe pressure on the unit causes alarm and power relays to deenergize (see power control options for more information regarding EPCU operation). EPCU Power Supply Terminals 120 VAC 240 VAC (Optional Voltage) Gnd Gnd Hot Hot Neu Neu In Out In Out Power Supply NO Com NC Terminals Remote Alarm Terminals 12

Barrier Fault & Active Status Indicators Barrier C Barrier B Barrier A Barrier Wiring Terminal Calibration Access EPCU Logic Module Primary Microprocessor LED Status Display Controller (GAL) Factory Programming Power Module Cable EDT, SLT & RET Timers EPCU Features LED DISPLAY INDICATORS Power Off: Red Power s Deenergized Power On: Green Power s Energized Safe : Blue > 0.50" w.c. Alarm Active: Red < 0.50" w.c. Bypass Engaged: Green Control Bypass Active - CB Modes Class II LED Displays EPCU Module Primary Safe Isolated Coil Voltage Transformer Voltage Input Selector (factory set for 120 or 240 VAC power) Input Fuse RESV RESV Factory Wiring Terminal 120/240 VAC EPCU Power Module Power Control Cable 20 A Power Fuse Power Module Wiring Terminal Space for Optional Safe Voltage Regulators Cable Logic Module Cable Safe 20 A Alarm 20 A Power s Alarm Only Alarm & Bypass FIELD ADJUSTABLE TIMER FUNCTIONS RET, EDT & SLT timers not functional on Model 2001B Systems Power Control Options NORMAL RUNNING (NR) MODE EPCU features an on-off pushbutton power control switch to activate control functions. must be depressed to initiate start-up. After completion of start-up, safe pressure must be lost or switch must be depressed to deenergize enclosure power relays. CONDITIONAL BYPASS (CB) MODE EPCU features an off-on-bypass power control switch to activate control functions. must be set to "on" position to initiate start-up. After enclosure power is energized, safe pressure must be lost or switch must be set to "off" position to deenergize enclosure power. After enclosure power is energized, switch may be set to "bypass" position to temporarily latch enclosure power relays. A flashing LED then indicates bypass engaged, and the enclosure can be accessed without deenergizing power (performed under specific conditions). Following access, safe pressure must be reestablished to resume normal operation. At that time, the switch may be reset to the "on" position without disruption of enclosure power. Alarm relay normally deenergizes only upon loss of safe pressure, but can be programmed to deenergize when bypass is engaged, if specified at time of order. Assembled Electrical Power Control Unit 13

System Accessories Diagram Model Number Designations 2001C - STD - CII - NR - LH - ## 1/2" Supply Tubing 1/4" Tubing Reference Supply Fitting EBC-8 Reference Fitting EFC-4 Protection Vent EPV-4-SA... Pressurized Protected Mounting Kit SMK-3 Warning Nameplate EWN-2 (Included with Panel) Series Model Number System Style STD - Standard Area Classification CII - Class II, Group E, F & G Area Power Control Mode NR - Normal Running CB - Conditional Bypass Mounting Configuration LH - left hand left side of enclosure RH - right hand right side of enclosure TM - top mount top of enclosure BM - bottom mount bottom of enclosure WM - wall mount wall surface FM* - frame mount external frame or rack PM* - panel mount enclosure surface cutout * FM & PM configurations feature flush mount EPCU. ## - See Accessories Page 132 for additional factory installed accessories OPTIONAL INTRINSIC SAFETY BARRIERS DESCRIPTION & OPERATION The EPCU Logic Module can accommodate up to three intrinsic safety barriers to interact with remote devices and affect operation of the EPCU. The barriers are installed and programmed by the factory at time of order, and they are designed to function either in conjunction with a customer furnished switch and a Pepperl+Fuchs furnished resistor network cable, or a Pepperl+Fuchs furnished proximity detector. Each barrier develops a low power signal to create a two-wire closed-loop circuit. Operational status of each barrier is indicated by a green LED to show active (closed switch) status, and by a red LED to show faulted (line breakage) cable status. All barriers can be reprogrammed to duplicate other barrier functions as required, upon specific request. BARRIER PROGRAMMING OPTIONS Barrier A Function - when switch opens Disables start-up cycle Deenergizes enclosure power and alarm relay Functions parallel to safe pressure switch Barrier B Function - when switch opens Not programmed - custom applications only Barrier C Function - when switch closes Energizes RESV relay - custom applications only Model 2001C System Accessories (See accessories page for complete details) CONNECTION FITTINGS EFC-4 1/4" Flush Connector EFC-8 1/2" Flush Connector EBC-8 1/2" Bulkhead Connector EPC-14 1-1/2" Pipe Connector ADDITIONAL ITEMS SMK-2, -3 or -10 System Mounting Kit RAH Remote Alarm Horn RAB-1 Div. 1 Remote Alarm Beacon LCK L Fitting Conduit Kit TCK T Fitting Conduit Kit SRM-4000 Resistor Module NJ... P+F Namur Senor INSTALLATION & OPERATION MANUAL 129-0210 Inst. & Operation Manual OPTIONAL ENCLOSURE PROTECTION VENTS EPV-4-SA-00 Straight w/spark Arrestor EPV-4-SA-90 Rt Angle w/spark Arrestor WARNING NAMEPLATES EWN-2 Class II Warning ETW Temperature Warning FACTORY INSTALLED ACCESSORIES IS1 Channel A Barrier IS2 Channel B Barrier IS3 Channel C Barrier RP1 Safe L Power Key Lock Assembly ONE (1) ENCLOSURE WARNING NAMEPLATE & ONE (1) INSTALLATION & OPERATION MANUAL ARE PROVIDED WITH EACH SYSTEM Overall System Dimensions ` STD Height Width Depth LH - left hand 20 11 10.75 RH - right hand 20 11 10.75 TM - top mount 10.50 20.75 10.75 BM - bottom mount 10.50 20.75 10.75 WM - wall mount 20 11 12.50 FM or PM - flat panel 22 13 11.50 Dimensions in inches. Mounting dimensions available upon request. FM & PM panel cutout dimensions: 21h x 12w Height & width dimensions reflect mounting plate measurements. Depth dimension reflects overall measurement of system, including components. 14

Class I ( 15 ft 3 ) Description Model 2002 is a Rapid Exchange purging system that operates on a supply of compressed instrument air or inert gas. It regulates and monitors pressure within sealed (protected) enclosure(s), in order to remove and prevent flammable gas or vapor accumulations. The system accomplishes four air exchanges and maintains a "safe" (0.25") pressure. A Pepperl+Fuchs Model EPV-2 enclosure protection vent is required for proper operation. In addition, the system includes an electrical power control unit (EPCU) that monitors system operation and controls enclosure power. All start-up requirements must be satisfied before the EPCU will energize power to the enclosure(s). This process reduces the hazardous (classified) area rating within the enclosure(s), in accordance with the NEC - NFPA 70, Article 500, NFPA 496 and ISA 12.4. Basic Operation Model 2002 In accordance with system instructions, start-up requires the air supply to be engaged and EPCU power to be energized. The enclosure protection vent must be tested and the enclosure(s) must be sealed. The EPCU power control switch must be activated and the system will self-test. The enclosure pressure control valve is used to manually set a safe reading on the enclosure pressure indicator. When safe pressure is stable, the Rapid Exchange control valve is fully engaged by manual or automatic means (dependent on System Style, see below). Upon completion of the Rapid Exchange cycle, (five minutes minimum) the Rapid Exchange control valve disengages manually or automatically. returns to the safe setting and enclosure power is energized by the EPCU. Loss of safe pressure causes the EPCU to deenergize power to the protected enclosure(s). All systems include form "C" contacts for audible or visual alarm systems. STD Style (Standard) FA/SA Style (Fully Automatic/Semiautomatic) Style Variances STD (Standard) Style systems require manual operation of the Rapid Exchange control valve. SA (Semiautomatic) Style systems require manual engagement of the Rapid Exchange control valve to initiate the exchange cycle, but automatically disengages the valve upon completion of the cycle. Loss of safe pressure requires an operator to manually restart both systems above FA (Fully Automatic) Style systems engage and disengage the Rapid Exchange control valve automatically, after an operator manually sets a safe pressure. In addition, FA Style systems restart automatically after a power or air pressure failure. Rapid Exchange is a Registered Trademark of Pepperl+Fuchs, Inc. SA (Semiautomatic) Style UL & FM Certified: Cl. I, Div. 1, Group C&D Rating Reduction: Standard Model Applications Model Number: 2002 Designation: Purging System Volume: 15 ft 3 max. STD (Standard) Style UL & FM Certified: Cl. I, Div. 1, Group C&D* Rating Reduction: Div. 1 to Nonhazardous Div. 1 to Nonhazardous FA (Fully Automatic) Style UL & FM Certified: Cl. I, Div. 1, Group C&D Rating Reduction: Div. 1 to Nonhazardous *Only FM Certified Group B System Available in STD Style 15

STD Style Gauge Reference Inlet Control Valve RESV Conduit EPCU Reference Tubing Flame Arrestor Fitting Filter Regulator Body: Regulator Handle & Bowl: Gauge: Rapid Exchange Gauge: Rapid Exchange Solenoid: Tube Fittings & Valves: Tubing: System Nameplates: Fastener Hardware: Mounting Plate: EPCU Body: Conduit & Fittings (SA & FA): Warning Nameplate: Material Specifications Lexan is a registered trademark of the General Electric Corporation Rapid Exchange Solenoid Valve Filter Regulator System Supply Inlet Supply Outlet Mounting Plate Venturi Orifice (not visible) SA & FA Style (with Rapid Exchange Solenoid Valve) CONNECTION POINTS SHOWN ABOVE IN BOLD TEXT ON SYSTEM DIAGRAM Electrical Wiring Diagram Zinc w/enamel Finish Polycarbonate Alum. w/enamel Finish Poly Case & Brass Tube Brass w/enamel Finish 316 SS Forged Body 316 SS 1/4".035 Welded Silkscreened Lexan & SS SS Screws & Bolts 316 14 Ga #3 Brush SS Bead Blast Cast Alum. Galvanized Steel Silkscreened SS Simplified EPCU Logic Diagram OPERATION Signal (1) from SPS is sent to µp, GAL and SPCR coil. During start-up, GAL verifies all µp functions. GAL & µp must receive uninterrupted signal from SPS to prevent logic resetting. After GAL verifies all start-up procedures, it sends "power enabled" signal (2) to PER coil. Then, µp sends "power request" signal (3) through the SPCR and PER contacts to EPR coils. Field Wired Power Module Terminals SPS (1) GAL CLK FAIL PRC µp (2) PER SPCR (3) EPR EPR SPS - Safe GAL - Gate Array Logic µp - Microprocessor PER - Power Enabled SPCR - Safe pressure confirmation relay EPR - Power 20 A FUSES Isolated Power s Isolated Alarm 1 2 3 4 5 6 7 8 9 10 System Specifications System Dimensions: See page 18 Shipping Weight (lb): STD - 45 / SA & FA - 47 Temp. Range: -20 F to +120 F Supply Range: 80-120 psi max. Capacity & Filtration: 1.5 oz @ 20 Microns Supply Requirements: Clean air or inert gas Safe Press. Setpoint: 0.25" @ Safe Press. Safe Press. Flow Rate: * 0.1-3.5 SCFH Exchange : 3" - 5" Exchange Flow Rate: ** 4 SCFM / 240 SCFH Exchange Time: 1 Minute/ft 3 System Supply Port: 1/4" FPT Supply Fitting: 1/4" Tube Fitting Reference Fitting: 1/4" Tube Fitting EPCU Conduit Port Size: 1/2" FPT EPCU Power Requirements: 120 VAC 60 Hz 1Ø (European 220 voltage only) 240 VAC 50 Hz 1Ø (All voltage ratings are factory set) EPCU Power Consumption: Power Contacts: Alarm N.O. Contact: Alarm N.C. Contact: 500 ma 20 A @ 240 VAC 20 A @ 28 VDC *** 20 A @ 48 VDC 20 A @ 240 VAC 20 A @ 28 VDC 15 A @ 240 VAC 10 A @ 28 VDC * integrity determines actual flow rate ** With regulator set to 60 psi min. during exchange EPCU Description The Pepperl+Fuchs Series EPCU is a factory programmed, field adjustable, microprocessor controlled unit featuring full status indication, redundant gate array logic and electromechanical relays. The EPCU is constructed from four major items: (1) a power module, (2) a pressure switch module, (3) a logic module and (4) a power mode selector switch. The sections are linked with polarized cable, and the boards are stacked in the EPCU enclosure on standoffs. Basic EPCU Operation When power is "off", the EPCU is at rest, alarm and power relays are deenergized, and the LED display is off. When power is switched "on", the EPCU performs a self-test of LED display and logic functions. The unit will then start-up. Class I units must detect a 0.25" pressure to energize the alarm relay and begin an exchange cycle. When the cycle stops, the power relays will energize. Loss of safe pressure on either unit causes alarm and power relays to deenergize (see power control options for more information regarding EPCU operation). EPCU Power Supply Terminals 120 VAC 240 VAC (Optional Voltage) Gnd Gnd Hot Hot Neu Neu In Out In Out Power Supply NO Com NC Terminals Remote Alarm Terminals 16

Barrier Fault & Active Status Indicators Barrier C Barrier B Barrier A Barrier Wiring Terminal Calibration Access EPCU Logic Module Primary Microprocessor LED Status Display Controller (GAL) Factory Programming Power Module Cable EDT, SLT & RET Timers EPCU Features LED DISPLAY INDICATORS Power Off: Red Power s Deenergized Power On: Green Power s Energized Safe : Blue > 0.15" w.c. Rapid Exchange: Blue > 2.0" w.c. Timer Running: Yellow Rapid Exchange Timer Active Alarm Active: Red < 0.15" w.c. Bypass Engaged: Green Control Bypass Active - CB EPCU Module Primary Safe Space for Optional Safe Isolated Coil Voltage Transformer Voltage Input Selector (factory set for 120 or 240 VAC power) Input Fuse RESV 120/240 VAC EPCU Power Module Power Control Cable Primary Rapid Exchange Space for Optional Rapid Exchange Voltage Regulators Cable Logic Module Cable Safe Rapid Exchange Alarm Only Alarm & Bypass FIELD ADJUSTABLE TIMER FUNCTIONS EDT (Exchange Delay Timer) (FA Style only) provides a time delay to prevent Rapid Exchange solenoid valve from energizing until safe pressure can be stabilized. SLT (Solenoid Latching Timer) (FA Style only) provides a time delay to keep the Rapid Exchange solenoid valve energized until exchange pressure is detected. If the pressure is not detected, the EPCU will reset. RET (Rapid Exchange Timer) provides a time delay after Rapid Exchange pressure is detected, to allow four volume exchanges prior to energizing the enclosure power relays. If safe pressure or Rapid Exchange pressure is lost or interrupted during time delay cycle, the EPCU will reset. Power Control Options NORMAL RUNNING (NR) MODE EPCU features an on-off pushbutton power control switch to activate control functions. must be depressed to initiate start-up. After completion of start-up, safe pressure must be lost or switch must be depressed to deenergize enclosure power relays. RESV Factory Wiring Terminal 20 A Power Fuse Power Module Wiring Terminal Assembled Electrical Power Control Unit 20 A Alarm 20 A Power s CONDITIONAL BYPASS (CB) MODE EPCU features an off-on-bypass power control switch to activate control functions. must be set to "on" position to initiate start-up. After enclosure power is energized, safe pressure must be lost or switch must be set to "off" position to deenergize enclosure power. After enclosure power is energized, switch may be set to "bypass" position to temporarily latch enclosure power relays. A flashing LED then indicates bypass engaged, and the enclosure can be accessed without deenergizing power (performed under specific conditions). Following access, safe pressure must be reestablished to resume normal operation. At that time, the switch may be reset to the "on" position without disruption of enclosure power. Alarm relay normally deenergizes only upon loss of safe pressure, but can be programmed to deenergize when bypass is engaged, if specified at time of order. 17

System Accessories Diagram Model Number Designations Supply Inlet Fitting SC-4 or NC-4 1/4" Supply Tubing 1/4" Tubing Reference Supply Fitting EBC-4 Reference Fitting EFC-4 Protection Vent EPV-2-SA... Pressurized Protected Mounting Kit SMK-3 Warning Nameplate EWN-1 (Included with Panel) OPTIONAL INTRINSIC SAFETY BARRIERS DESCRIPTION & OPERATION The EPCU Logic Module can accommodate up to three intrinsic safety barriers to interact with remote devices and affect operation of the EPCU. The barriers are installed and programmed by the factory at time of order, and they are designed to function either in conjunction with a customer furnished switch and a Pepperl+Fuchs furnished resistor network cable, or a Pepperl+Fuchs furnished proximity detector. Each barrier develops a low power signal to create a two-wire closed-loop circuit. Operational status of each barrier is indicated by a green LED to show active (closed switch) status, and by a red LED to show faulted (line breakage) cable status. All barriers can be reprogrammed to duplicate other barrier functions as required, upon specific request. 2002 - STD - CI - NR - LH - ## Series Model Number System Style STD - Standard SA - Semiautomatic FA - Fully Automatic Area Classification CI - Class I, Group C & D Area IB - Class I, Group B Area (STD Only) Power Control Mode NR - Normal Running CB - Conditional Bypass Mounting Configuration LH - left hand left side of enclosure RH - right hand right side of enclosure TM - top mount top of enclosure BM - bottom mount bottom of enclosure WM - wall mount wall surface FM* - frame mount external frame or rack PM* - panel mount enclosure surface cutout * FM & PM configurations feature flush mount EPCU. Flush mount EPCU is not suitable for Group B Area. ## - See Accessories Page 132 for additional factory installed accessories BARRIER PROGRAMMING OPTIONS Barrier A Function - when switch opens Disables start-up cycle Deenergizes enclosure power and alarm relay Functions parallel to safe pressure switch Barrier B Function - when switch opens Not programmed - custom applications only Barrier C Function - when switch closes Energizes RESV relay - custom applications only Model 2002 System Accessories (See accessories page for complete details) CONNECTION FITTINGS TCK T Fitting Conduit Kit WARNING NAMEPLATES NC-4 1/4" Ninety Connector SRM-4000 Resistor Module EWN-1 Class I Warning SC-4 1/4" Straight Connector NJ... P+F Namur Sensor ETW Temperature Warning EFC-4 1/4" Flush Connector INSTALLATION & OPERATION MANUAL FACTORY INSTALLED ACCESSORIES EBC-4 1/4" Bulkhead Connector 129-0211 Inst. & Operation Manual IS1 Channel A Barrier EPC-12 3/4" Pipe Connector ENCLOSURE PROTECTION VENTS IS2* Channel B Barrier ADDITIONAL ITEMS ONE VENT REQUIRED WITH EACH SYSTEM IS3* Channel C Barrier SMK-2, -3 or -10 System Mounting Kit EPV-2-SA-00 Straight w/spark Arrestor RP1 Safe RAH Remote Alarm Horn EPV-2-SA-90 Rt Angle w/spark Arrestor RP2 Rapid Exchange RAB-1 Div. 1 Remote Alarm Beacon L Power Key Lock Assembly LCK L Fitting Conduit Kit *Requires custom programming information ONE (1) ENCLOSURE WARNING NAMEPLATE & ONE (1) INSTALLATION & OPERATION MANUAL ARE PROVIDED WITH EACH SYSTEM Overall System Dimensions STD / SA & FA LH - left hand RH - right hand TM - top mount BM - bottom mount WM - wall mount FM or PM - flat panel Height 22 22 12 12 22 24 Width 11 11 23 23 11 13 Depth 10.75 / 13.75 10.75 / 13.75 10.75 / 13.75 10.75 / 13.75 12.50 / 14.50 11.50 / 14.50 Dimensions in inches. Mounting dimensions available upon request. FM & PM panel cutout dimensions: 23h x 12w Height & width dimensions reflect mounting plate measurements. Depth dimension reflects overall measurement of system, including components. 18

Class I ( 75 ft 3 ) Description Model 2003 is a Rapid Exchange purging system that operates on a supply of compressed instrument air or inert gas. It regulates and monitors pressure within sealed (protected) enclosure(s), in order to remove and prevent flammable gas or vapor accumulations. The system accomplishes four air exchanges and maintains a "safe" (0.25") pressure. A Pepperl+Fuchs Model EPV-3 Protection Vent is required for proper operation. In addition, the system includes an electrical power control unit (EPCU) that monitors system operation and controls enclosure power. All start-up requirements must be satisfied before the EPCU will energize power to the enclosure(s). This process reduces the hazardous (classified) area rating within the enclosure(s), in accordance with the NEC - NFPA 70, Article 500, NFPA 496 and ISA 12.4. Basic Operation Model 2003 In accordance with system instructions, start-up requires the air supply to be engaged and EPCU power to be energized. The enclosure protection vent must be tested and the enclosure(s) must be sealed. The EPCU power control switch must be activated and the system will self-test. The enclosure pressure control valve is used to manually set a safe reading on the enclosure pressure indicator. When safe pressure is stable, the Rapid Exchange control valve is fully engaged by manual or automatic means (dependent on System Style, see below). Upon completion of the Rapid Exchange cycle, (five minutes minimum) the Rapid Exchange control valve disengages manually or automatically. returns to the safe setting and enclosure power is energized by the EPCU. Loss of safe pressure causes the EPCU to deenergize power to the protected enclosure(s). All systems include form "C" contacts for audible or visual alarm systems. STD Style (Standard) FA/SA Style (Fully Automatic/Semiautomatic) Style Variances STD (Standard) Style systems require manual operation of the Rapid Exchange control valve. SA (Semiautomatic) Style systems require manual engagement of the Rapid Exchange control valve to initiate the exchange cycle, but automatically disengages the valve upon completion of the cycle. Loss of safe pressure requires an operator to manually restart both systems above. FA (Fully Automatic) Style systems engage and disengage the Rapid Exchange control valve automatically, after an operator manually sets a safe pressure. In addition, FA Style systems restart automatically after a power or air pressure failure. Rapid Exchange is a Registered Trademark of Pepperl+Fuchs. SA (Semiautomatic) Style UL & FM Certified: Cl. I, Div. 1, Group C&D Rating Reduction: Standard Model Applications Model Number: 2003 Designation: Purging System Volume: 75 ft 3 max. STD (Standard) Style UL & FM Certified: Cl. I, Div. 1, Group C&D* Rating Reduction: Div. 1 to Nonhazardous Div. 1 to Nonhazardous FA (Fully Automatic) Style UL & FM Certified: Cl. I, Div. 1, Group C&D Rating Reduction: Div. 1 to Nonhazardous *Only FM Certified Group B System Available in STD Style 19

STD Style Gauge Reference Inlet Control Valve RESV Conduit EPCU Reference Tubing Flame Arrestor Fitting Filter Regulator Body: Regulator Handle & Bowl: Gauge: Rapid Exchange Gauge: Rapid Exchange Solenoid: Tube Fittings & Valves: Tubing: System Nameplates: Fastener Hardware: Mounting Plate: EPCU Body: Conduit & Fittings (SA & FA): Warning Nameplate: Material Specifications Rapid Exchange Solenoid Valve Filter Regulator System Supply Inlet Supply Outlet Mounting Plate Venturi Orifice (not visible) SA & FA Style (with Rapid Exchange Solenoid Valve) CONNECTION POINTS SHOWN ABOVE IN BOLD TEXT ON SYSTEM DIAGRAM Zinc w/enamel Finish Polycarbonate Alum. w/enamel Finish Poly Case & Brass Tube Brass w/enamel Finish 316 SS Forged Body 316 SS 1/4" & 3/8".035 Welded Silkscreened Lexan & SS SS Screws & Bolts 316 14 Ga #3 Brush SS Bead Blast Cast Alum. Galvanized Steel Silkscreened SS System Specifications System Dimensions: See page 22 Shipping Weight: STD - 45 lb / SA & FA - 47 lb Temp. Range: -20 F to +120 F Supply Range: 80-120 psi max. Capacity & Filtration: 3.8 oz @ 40 Microns Supply Requirements: Clean air or inert gas Safe Press. Setpoint: 0.25" @ Safe Press. Safe Press. Flow Rate: * 0.1-3.5 SCFH Exchange : 3" - 5" Exchange Flow Rate: ** 10 SCFM / 600 SCFH Exchange Time: 1 Minute / 2.5 ft 3 System Supply Port: 3/8" FPT Supply Fitting: 3/8" Tube Fitting Reference Fitting: 1/4" Tube Fitting EPCU Conduit Port Size: 1/2" FPT EPCU Power Requirements: 120 VAC 60 Hz 1Ø (European 220 voltage only) 240 VAC 50 Hz 1Ø (All voltage ratings are factory set) EPCU Power Consumption: 500 ma Power Contacts: 20 A @ 240 VAC 20 A @ 28 VDC *** 20 A @ 48 VDC Alarm N.O. Contact: 20 A @ 240 VAC 20 A @ 28 VDC Alarm N.C. Contact: 15 A @ 240 VAC 10 A @ 28 VDC * integrity determines actual flow rate ** With regulator set to 60 psi min. during exchange EPCU Description Lexan is a registered trademark of the General Electric Corporation Simplified EPCU Logic Diagram OPERATION Signal (1) from SPS is sent to µp, GAL and SPCR coil. During start-up, GAL verifies all µp functions. GAL & µp must receive uninterrupted signal from SPS to prevent logic resetting. After GAL verifies all start-up procedures, it sends "power enabled" signal (2) to PER coil. Then, µp sends "power request" signal (3) through the SPCR and PER contacts to EPR coils. SPS (1) GAL CLK FAIL PRC µp (2) PER SPCR (3) Electrical Wiring Diagram Field Wired Power Module Terminals EPR EPR SPS - Safe GAL - Gate Array Logic µp - Microprocessor PER - Power Enabled SPCR - Safe pressure confirmation relay EPR - Power 20 A FUSES Isolated Power s Isolated Alarm 1 2 3 4 5 6 7 8 9 10 The Pepperl+Fuchs Series EPCU is a factory programmed, field adjustable, microprocessor controlled unit featuring full status indication, redundant gate array logic and electromechanical relays. The EPCU is constructed from four major items: (1) a power module, (2) a pressure switch module, (3) a logic module and (4) a power mode selector switch. The sections are linked with polarized cable, and the boards are stacked in the EPCU enclosure on standoffs. Basic EPCU Operation When power is "off", the EPCU is at rest, alarm and power relays are deenergized, and the LED display is off. When power is switched "on", the EPCU performs a self-test of LED display and logic functions. The unit will then start-up. Class I units must detect a 0.25" pressure to energize the alarm relay and begin an exchange cycle. When the cycle stops, the power relays will energize. Loss of safe pressure on either unit causes alarm and power relays to deenergize (see power control options for more information regarding EPCU operation). EPCU Power Supply Terminals 120 VAC 240 VAC (Optional Voltage) Gnd Gnd Hot Hot Neu Neu In Out In Out Power Supply NO Com NC Terminals Remote Alarm Terminals 20

Barrier Fault & Active Status Indicators Barrier C Barrier B Barrier A Barrier Wiring Terminal Calibration Access EPCU Logic Module Primary Microprocessor LED Status Display Controller (GAL) Factory Programming Power Module Cable EDT, SLT & RET Timers EPCU Features LED DISPLAY INDICATORS Power Off: Red Power s Deenergized Power On: Green Power s Energized Safe : Blue > 0.15" w.c. Rapid Exchange: Blue > 2.0" w.c. Timer Running: Yellow Rapid Exchange Timer Active Alarm Active: Red < 0.15" w.c. Bypass Engaged: Green Control Bypass Active - CB EPCU Module Primary Safe Space for Optional Safe Isolated Coil Voltage Transformer Voltage Input Selector (factory set for 120 or 240 VAC power) Input Fuse RESV 120/240 VAC EPCU Power Module Power Control Cable Primary Rapid Exchange Space for Optional Rapid Exchange Voltage Regulators Cable Logic Module Cable Safe Rapid Exchange Alarm Only Alarm & Bypass FIELD ADJUSTABLE TIMER FUNCTIONS EDT (Exchange Delay Timer) (FA Style only) provides a time delay to prevent Rapid Exchange solenoid valve from energizing until safe pressure can be stabilized. SLT (Solenoid Latching Timer) (FA Style only) provides a time delay to keep the Rapid Exchange solenoid valve energized until exchange pressure is detected. If the pressure is not detected, the EPCU will reset. RET (Rapid Exchange Timer) provides a time delay after Rapid Exchange pressure is detected, to allow four volume exchanges prior to energizing the enclosure power relays. If safe pressure or Rapid Exchange pressure is lost or interrupted during time delay cycle, the EPCU will reset. Power Control Options NORMAL RUNNING (NR) MODE EPCU features an on-off pushbutton power control switch to activate control functions. must be depressed to initiate start-up. After completion of start-up, safe pressure must be lost or switch must be depressed to deenergize enclosure power relays. RESV Factory Wiring Terminal 20 A Power Fuse Power Module Wiring Terminal Assembled Electrical Power Control Unit 20 A Alarm 20 A Power s CONDITIONAL BYPASS (CB) MODE EPCU features an off-on-bypass power control switch to activate control functions. must be set to "on" position to initiate start-up. After enclosure power is energized, safe pressure must be lost or switch must be set to "off" position to deenergize enclosure power. After enclosure power is energized, switch may be set to "bypass" position to temporarily latch enclosure power relays. A flashing LED then indicates bypass engaged, and the enclosure can be accessed without deenergizing power (performed under specific conditions). Following access, safe pressure must be reestablished to resume normal operation. At that time, the switch may be reset to the "on" position without disruption of enclosure power. Alarm relay normally deenergizes only upon loss of safe pressure, but can be programmed to deenergize when bypass is engaged, if specified at time of order. 21

System Accessories Diagram Model Number Designations Supply Inlet Fitting SC-6 or NC-6 3/8" Supply Tubing 1/4" Tubing Reference Supply Fitting EBC-6 Reference Fitting EFC-4 Protection Vent EPV-3-SA... Pressurized Protected Mounting Kit SMK-3 Warning Nameplate EWN-1 (Included with Panel) OPTIONAL INTRINSIC SAFETY BARRIERS DESCRIPTION & OPERATION The EPCU Logic Module can accommodate up to three intrinsic safety barriers to interact with remote devices and affect operation of the EPCU. The barriers are installed and programmed by the factory at time of order, and they are designed to function either in conjunction with a customer furnished switch and a Pepperl+Fuchs furnished resistor network cable, or a Pepperl+Fuchs furnished proximity detector. Each barrier develops a low power signal to create a two-wire closed-loop circuit. Operational status of each barrier is indicated by a green LED to show active (closed switch) status, and by a red LED to show faulted (line breakage) cable status. All barriers can be reprogrammed to duplicate other barrier functions as required, upon specific request. 2003 - STD - CI - NR - LH - ## Series Model Number System Style STD - Standard SA - Semiautomatic FA - Fully Automatic Area Classification CI - Class I, Group C & D Area IB - Class I, Group B Area (STD Only) Power Control Mode NR - Normal Running CB - Conditional Bypass Mounting Configuration LH - left hand left side of enclosure RH - right hand right side of enclosure TM - top mount top of enclosure BM - bottom mount bottom of enclosure WM - wall mount wall surface FM* - frame mount external frame or rack PM* - panel mount enclosure surface cutout * FM & PM configurations feature flush mount EPCU. Flush mount EPCU is not suitable for Group B Area. ## - See Accessories Page 132 for additional factory installed accessories BARRIER PROGRAMMING OPTIONS Barrier A Function - when switch opens Disables start-up cycle Deenergizes enclosure power and alarm relay Functions parallel to safe pressure switch Barrier B Function - when switch opens Not programmed - custom applications only Barrier C Function - when switch closes Energizes RESV relay - custom applications only Model 2003 System Accessories (See accessories page for complete details) CONNECTION FITTINGS NC-6 3/8" Ninety Connector SC-6 3/8" Straight Connector EFC-4 1/4" Flush Connector EFC-6 3/8" Flush Connector EBC-6 3/8" Bulkhead Connector EPC-13 1" Pipe Connector ADDITIONAL ITEMS SMK-2, -3 or -10 System Mounting Kit RAH Remote Alarm Horn RAB-1 Div. 1 Remote Alarm Beacon LCK L Fitting Conduit Kit TCK T Fitting Conduit Kit SRM-4000 Resistor Module NJ... P+F Namur Sensor INSTALLATION & OPERATION MANUAL 129-0212 Inst. & Operation Manual ENCLOSURE PROTECTION VENTS ONE VENT REQUIRED WITH EACH SYSTEM EPV-3-SA-00 Straight w/spark Arrestor EPV-3-SA-90 Rt Angle w/spark Arrestor WARNING NAMEPLATES EWN-1 Class I Warning ETW Temperature Warning FACTORY INSTALLED ACCESSORIES IS1 Channel A Barrier IS2* Channel B Barrier IS3* Channel C Barrier RP1 Safe RP2 Rapid Exchange L Power Key Lock Assembly *Requires custom programming information ONE (1) ENCLOSURE WARNING NAMEPLATE & ONE (1) INSTALLATION & OPERATION MANUAL ARE PROVIDED WITH EACH SYSTEM Overall System Dimensions STD / SA & FA LH - left hand RH - right hand TM - top mount BM - bottom mount WM - wall mount FM or PM - flat panel Height 23 23 12 12 23 25 Width 11.50 11.50 23 23 11.50 13.50 Depth 10.75 / 15.25 10.75 / 15.25 10.75 / 15.25 10.75 / 15.25 12.50 / 16.50 12.25 / 15.75 Dimensions in inches. Mounting dimensions available upon request. FM & PM panel cutout dimensions: 24h x 12.50w Height & width dimensions reflect mounting plate measurements. Depth dimension reflects overall measurement of system, including components. 22

Class I ( 200 ft 3 ) Description Model 2004 is a Rapid Exchange purging system that operates on a supply of compressed instrument air or inert gas. It regulates and monitors pressure within sealed (protected) enclosure(s), in order to remove and prevent flammable gas or vapor accumulations. The system accomplishes four air exchanges and maintains a "safe" (0.25") pressure. A Pepperl+Fuchs Model EPV-4 Protection Vent is required for proper operation. In addition, the system includes an electrical power control unit (EPCU) that monitors system operation and controls enclosure power. All start-up requirements must be satisfied before the EPCU will energize power to the enclosure(s). This process reduces the hazardous (classified) area rating within the enclosure(s), in accordance with the NEC - NFPA 70, Article 500, NFPA 496 and ISA 12.4. Basic Operation Model 2004 In accordance with system instructions, start-up requires the air supply to be engaged and EPCU power to be energized. The enclosure protection vent must be tested and the enclosure(s) must be sealed. The EPCU power control switch must be activated and the system will self-test. The enclosure pressure control valve is used to manually set a safe reading on the enclosure pressure indicator. When safe pressure is stable, the Rapid Exchange control valve is fully engaged by manual or automatic means (dependent on System Style, see below). Upon completion of the Rapid Exchange cycle, (five minutes minimum) the Rapid Exchange control valve disengages manually or automatically. returns to the safe setting and enclosure power is energized by the EPCU. Loss of safe pressure causes the EPCU to deenergize power to the protected enclosure(s). All systems include form "C" contacts for audible or visual alarm systems. STD Style (Standard) FA/SA Style (Fully Automatic/Semiautomatic) Style Variances STD (Standard) Style systems require manual operation of the Rapid Exchange control valve. SA (Semiautomatic) Style systems require manual engagement of the Rapid Exchange control valve to initiate the exchange cycle, but automatically disengages the valve upon completion of the cycle. Loss of safe pressure requires an operator to manually restart both systems above FA (Fully Automatic) Style systems engage and disengage the Rapid Exchange control valve automatically, after an operator manually sets a safe pressure. In addition, FA Style systems restart automatically after a power or air pressure failure. Rapid Exchange is a Registered Trademark of Pepperl+Fuchs. Standard Model Applications Model Number: Designation: Volume: STD (Standard) Style UL & FM Certified: Rating Reduction: 2004 Purging System 200 ft 3 max. Cl. I, Div. 1, Group C&D* Div. 1 to Nonhazardous SA (Semiautomatic) Style FA (Fully Automatic) Style UL & FM Certified: Cl. I, Div. 1, UL & FM Certified: Cl. I, Div. 1, Group C&D Group C&D Rating Reduction: Div. 1 to Rating Reduction: Nonhazardous Div. 1 to Nonhazardous *Only FM Certified Group B System Available in STD Style 23

STD Style Gauge Reference Inlet Control Valve RESV Conduit EPCU Reference Tubing Flame Arrestor Fitting Filter Regulator Body: Regulator Handle & Bowl: Gauge: Rapid Exchange Gauge: Rapid Exchange Solenoid: Tube Fittings & Valves: Tubing: System Nameplates: Fastener Hardware: Mounting Plate: EPCU Body: Conduit & Fittings (SA & FA): Warning Nameplate: Material Specifications Rapid Exchange Solenoid Valve Filter Regulator System Supply Inlet Supply Outlet Mounting Plate Venturi Orifice (not visible) SA & FA Style (with Rapid Exchange Solenoid Valve) CONNECTION POINTS SHOWN ABOVE IN BOLD TEXT ON SYSTEM DIAGRAM Zinc w/enamel Finish Polycarbonate Alum. w/enamel Finish Poly Case & Brass Tube Brass w/enamel Finish 316 SS Forged Body 316 SS 1/4" & 3/8".035 Welded Silkscreened Lexan & SS Alum. & Stainless Steel 316 14 Ga #3 Brush SS Bead Blast Cast Alum. Galvanized Steel Silkscreened SS System Specifications System Dimensions: See page 26 Shipping Weight: STD - 49 lb / SA & FA - 51 lb Temp. Range: -20 F to +120 F Supply Range: 80-120 psi max. Capacity & Filtration: 3.8 oz @ 40 Microns Supply Requirements: Clean air or inert gas Safe Press. Setpoint: 0.25" @ Safe Press. Safe Press. Flow Rate: * 0.1-3.5 SCFH Exchange : 3" - 5" Exchange Flow Rate: ** 30 SCFM/1800 SCFH Exchange Time: 1 Minute/7.5 ft 3 System Supply Port: 1/2" FPT Supply Fitting: 1/2" Tube Fitting Reference Fitting: 1/4" Tube Fitting EPCU Conduit Port Size: 1/2" FPT EPCU Power Requirements: 120 VAC 60 Hz 1Ø (European 220 voltage only) 240 VAC 50 Hz 1Ø (All voltage ratings are factory set) EPCU Power Consumption: 500 ma Power Contacts: 20 A @ 240 VAC 20 A @ 28 VDC *** 20 A @ 48 VDC Alarm N.O. Contact: 20 A @ 240 VAC 20 A @ 28 VDC Alarm N.C. Contact: 15 A @ 240 VAC 10 A @ 28 VDC * integrity determines actual flow rate ** With regulator set to 80 psi min. during exchange EPCU Description Lexan is a registered trademark of the General Electric Corporation Simplified EPCU Logic Diagram OPERATION Signal (1) from SPS is sent to µp, GAL and SPCR coil. During start-up, GAL verifies all µp functions. GAL & µp must receive uninterrupted signal from SPS to prevent logic resetting. After GAL verifies all start-up procedures, it sends "power enabled" signal (2) to PER coil. Then, µp sends "power request" signal (3) through the SPCR and PER contacts to EPR coils. SPS (1) GAL CLK FAIL PRC µp (2) PER SPCR (3) Electrical Wiring Diagram Field Wired Power Module Terminals EPR EPR SPS - Safe GAL - Gate Array Logic µp - Microprocessor PER - Power Enabled SPCR - Safe pressure confirmation relay EPR - Power 20 A FUSES Isolated Power s Isolated Alarm 1 2 3 4 5 6 7 8 9 10 The Pepperl+Fuchs Series EPCU is a factory programmed, field adjustable, microprocessor controlled unit featuring full status indication, redundant gate array logic and electromechanical relays. The EPCU is constructed from four major items: (1) a power module, (2) a pressure switch module, (3) a logic module and (4) a power mode selector switch. The sections are linked with polarized cable, and the boards are stacked in the EPCU enclosure on standoffs. Basic EPCU Operation When power is "off", the EPCU is at rest, alarm and power relays are deenergized, and the LED display is off. When power is switched "on", the EPCU performs a self-test of LED display and logic functions. The unit will then start-up. Class I units must detect a 0.25" pressure to energize the alarm relay and begin an exchange cycle. When the cycle stops, the power relays will energize. Loss of safe pressure on either unit causes alarm and power relays to deenergize (see power control options for more information regarding EPCU operation). EPCU Power Supply Terminals 120 VAC 240 VAC (Optional Voltage) Gnd Gnd Hot Hot Neu Neu In Out In Out Power Supply NO Com NC Terminals Remote Alarm Terminals 24

Barrier Fault & Active Status Indicators Barrier C Barrier B Barrier A Barrier Wiring Terminal Calibration Access EPCU Logic Module Primary Microprocessor LED Status Display Controller (GAL) Factory Programming Power Module Cable EDT, SLT & RET Timers EPCU Features LED DISPLAY INDICATORS Power Off: Red Power s Deenergized Power On: Green Power s Energized Safe : Blue > 0.15" w.c. Rapid Exchange: Blue > 2.0" w.c. Timer Running: Yellow Rapid Exchange Timer Active Alarm Active: Red < 0.15" w.c. Bypass Engaged: Green Control Bypass Active - CB EPCU Module Primary Safe Space for Optional Safe Isolated Coil Voltage Transformer Voltage Input Selector (factory set for 120 or 240 VAC power) Input Fuse RESV RESV Factory Wiring Terminal 120/240 VAC EPCU Power Module 20 A Power Fuse Power Control Cable Power Module Wiring Terminal Assembled Electrical Power Control Unit Primary Rapid Exchange Space for Optional Rapid Exchange Voltage Regulators Cable Logic Module Cable Safe Rapid Exchange 20 A Alarm 20 A Power s Alarm Only Alarm & Bypass FIELD ADJUSTABLE TIMER FUNCTIONS EDT (Exchange Delay Timer) (FA Style only) provides a time delay to prevent Rapid Exchange solenoid valve from energizing until safe pressure can be stabilized. SLT (Solenoid Latching Timer) (FA Style only) provides a time delay to keep the Rapid Exchange solenoid valve energized until exchange pressure is detected. If the pressure is not detected, the EPCU will reset. RET (Rapid Exchange Timer) provides a time delay after Rapid Exchange pressure is detected, to allow four volume exchanges prior to energizing the enclosure power relays. If safe pressure or Rapid Exchange pressure is lost or interrupted during time delay cycle, the EPCU will reset. Power Control Options NORMAL RUNNING (NR) MODE EPCU features an on-off pushbutton power control switch to activate control functions. must be depressed to initiate start-up. After completion of start-up, safe pressure must be lost or switch must be depressed to deenergize enclosure power relays. CONDITIONAL BYPASS (CB) MODE EPCU features an off-on-bypass power control switch to activate control functions. must be set to "on" position to initiate start-up. After enclosure power is energized, safe pressure must be lost or switch must be set to "off" position to deenergize enclosure power. After enclosure power is energized, switch may be set to "bypass" position to temporarily latch enclosure power relays. A flashing LED then indicates bypass engaged, and the enclosure can be accessed without deenergizing power (performed under specific conditions). Following access, safe pressure must be reestablished to resume normal operation. At that time, the switch may be reset to the "on" position without disruption of enclosure power. Alarm relay normally deenergizes only upon loss of safe pressure, but can be programmed to deenergize when bypass is engaged, if specified at time of order. 25

System Accessories Diagram Model Number Designations Supply Inlet Fitting SC-6 or NC-8 1/2" Supply Tubing 1/4" Tubing Reference Supply Fitting EBC-8 Reference Fitting EFC-4 Protection Vent EPV-4-SA... Pressurized Protected Mounting Kit SMK-3 Warning Nameplate EWN-1 (Included with Panel) OPTIONAL INTRINSIC SAFETY BARRIERS DESCRIPTION & OPERATION The EPCU Logic Module can accommodate up to three intrinsic safety barriers to interact with remote devices and affect operation of the EPCU. The barriers are installed and programmed by the factory at time of order, and they are designed to function either in conjunction with a customer furnished switch and a Pepperl+Fuchs furnished resistor network cable, or a Pepperl+Fuchs furnished proximity detector. Each barrier develops a low power signal to create a two-wire closed-loop circuit. Operational status of each barrier is indicated by a green LED to show active (closed switch) status, and by a red LED to show faulted (line breakage) cable status. All barriers can be reprogrammed to duplicate other barrier functions as required, upon specific request. 2004 - STD - CI - NR - LH - ## Series Model Number System Style STD - Standard SA - Semiautomatic FA - Fully Automatic Area Classification CI - Class I, Group C & D Area IB - Class I, Group B Area (STD Only) Power Control Mode NR - Normal Running CB - Conditional Bypass Mounting Configuration LH - left hand left side of enclosure RH - right hand right side of enclosure TM - top mount top of enclosure BM - bottom mount bottom of enclosure WM - wall mount wall surface FM* - frame mount external frame or rack PM* - panel mount enclosure surface cutout * FM & PM configurations feature flush mount EPCU. Flush mount EPCU is not suitable for Group B Area. ## - See Accessories Page 132 for additional factory installed accessories BARRIER PROGRAMMING OPTIONS Barrier A Function - when switch opens Disables start-up cycle Deenergizes enclosure power and alarm relay Functions parallel to safe pressure switch Barrier B Function - when switch opens Not programmed - custom applications only Barrier C Function - when switch closes Energizes RESV relay - custom applications only Model 2004 System Accessories (See accessories page for complete details) CONNECTION FITTINGS NC-8 1/2" Ninety Connector SC-8 1/2" Straight Connector EFC-4 1/4" Flush Connector EFC-8 1/2" Flush Connector EBC-8 1/2" Bulkhead Connector EPC-14 1-1/2" Pipe Connector ADDITIONAL ITEMS SMK-2, -3 or -10 System Mounting Kit RAH Remote Alarm Horn RAB-1 Div. 1 Remote Alarm Beacon LCK L Fitting Conduit Kit TCK T Fitting Conduit Kit SRM-4000 Resistor Module NJ... P+F Namur Sensor INSTALLATION & OPERATION MANUAL 129-0213 Inst. & Operation Manual ENCLOSURE PROTECTION VENTS ONE VENT REQUIRED WITH EACH SYSTEM EPV-4-SA-00 Straight w/spark Arrestor EPV-4-SA-90 Rt Angle w/spark Arrestor WARNING NAMEPLATES EWN-1 Class I Warning ETW Temperature Warning FACTORY INSTALLED ACCESSORIES IS1 Channel A Barrier IS2* Channel B Barrier IS3* Channel C Barrier RP1 Safe RP2 Rapid Exchange L Power Key Lock Assembly *Requires custom programming information ONE (1) ENCLOSURE WARNING NAMEPLATE & ONE (1) INSTALLATION & OPERATION MANUAL ARE PROVIDED WITH EACH SYSTEM Overall System Dimensions STD / SA & FA LH - left hand RH - right hand TM - top mount BM - bottom mount WM - wall mount FM or PM - flat panel Height 24 24 14 14 24 26 Width 13.50 13.50 24 24 13.50 15.50 Depth 11.75 / 15.25 11.75 / 15.25 11.75 / 15.25 11.75 / 15.25 12.50 / 16.50 11.50 / 15.75 Dimensions in inches. Mounting dimensions available upon request. FM & PM panel cutout dimensions: 25h x 14.50w Height & width dimensions reflect mounting plate measurements. Depth dimension reflects overall measurement of system, including components. 26

Class I ( 450 ft 3 ) Description Model 2005 is a Rapid Exchange purging system that operates on a supply of compressed instrument air or inert gas. It regulates and monitors pressure within sealed (protected) enclosure(s), in order to remove and prevent flammable gas or vapor accumulations. The system accomplishes four air exchanges and maintains a "safe" (0.25") pressure. A Pepperl+Fuchs Model EPV-5 Protection Vent is required for proper operation. In addition, the system includes an electrical power control unit (EPCU) that monitors system operation and controls enclosure power. All start-up requirements must be satisfied before the EPCU will energize power to the enclosure(s). This process reduces the hazardous (classified) area rating within the enclosure(s), in accordance with the NEC - NFPA 70, Article 500, NFPA 496 and ISA 12.4. Basic Operation Model 2005 In accordance with system instructions, start-up requires the air supply to be engaged and EPCU power to be energized. The enclosure protection vent must be tested and the enclosure(s) must be sealed. The EPCU power control switch must be activated and the system will self-test. The enclosure pressure control valve is used to manually set a safe reading on the enclosure pressure indicator. When safe pressure is stable, the Rapid Exchange control valve is fully engaged by manual or automatic means (dependent on System Style, see below). Upon completion of the Rapid Exchange cycle, (five minutes minimum) the Rapid Exchange control valve disengages manually or automatically. returns to the safe setting and enclosure power is energized by the EPCU. Loss of safe pressure causes the EPCU to deenergize power to the protected enclosure(s). All systems include form "C" contacts for audible or visual alarm systems. STD Style (Standard) FA/SA Style (Fully Automatic/Semiautomatic) Style Variances STD (Standard) Style systems require manual operation of the Rapid Exchange control valve. SA (Semiautomatic) Style systems require manual engagement of the Rapid Exchange control valve to initiate the exchange cycle, but automatically disengages the valve upon completion of the cycle. Loss of safe pressure requires an operator to manually restart both systems above FA (Fully Automatic) Style systems engage and disengage the Rapid Exchange control valve automatically, after an operator manually sets a safe pressure. In addition, FA Style systems restart automatically after a power or air pressure failure. Rapid Exchange is a Registered Trademark of Pepperl+Fuchs, Inc. SA (Semiautomatic) Style UL & FM Certified: Cl. I, Div. 1, Group C&D Rating Reduction: Standard Model Applications Model Number: Designation: Volume: STD (Standard) Style UL & FM Certified: Rating Reduction: Div. 1 to Nonhazardous 2005 Purging System 450 ft 3 max. Cl. I, Div. 1, Group C&D* Div. 1 to Nonhazardous FA (Fully Automatic) Style UL & FM Certified: Cl. I, Div. 1, Group C&D Rating Reduction: Div. 1 to Nonhazardous *Only FM Certified Group B System Available in STD Style 27

STD Style Rapid Exchange Solenoid Valve Gauge Supply Outlet Reference Inlet Control Valve Venturi Orifice SA & FA Style (with Rapid Exchange Solenoid Valve) Filter Regulator Body: Regulator Handle & Bowl: Gauge: Rapid Exchange Gauge: Rapid Exchange Solenoid: Pipe Fittings & Valves: Tubing: System Nameplates: Fastener Hardware: Mounting Plate: EPCU Body: Conduit & Fittings (SA & FA): Warning Nameplate: Material Specifications Filter Regulator System Supply Inlet Mounting Plate RESV Conduit EPCU Reference Tubing Flame Arrestor Fitting (not visible) CONNECTION POINTS SHOWN ABOVE IN BOLD TEXT ON SYSTEM DIAGRAM Zinc w/enamel Finish Polycarbonate Alum. w/enamel Finish Poly Case & Brass Tube Brass w/enamel Finish 316 SS Forged Body 316 SS 1/4".035 Welded Silkscreened Lexan & SS Alum. & Stainless Steel Screws & Bolts 316 14 Ga #3 Brush SS Bead Blast Cast Alum. Galvanized Steel Silkscreened SS System Specifications System Dimensions: See page 30 Shipping Weight: STD - 51 lb / SA & FA - 53 lb Temp. Range: -20 F to +120 F Supply Range: 80-120 psi max. Capacity & Filtration: 8.5 oz @ 40 Microns Supply Requirements: Clean air or inert gas Safe Press. Setpoint: 0.25" @ Safe Press. Safe Press. Flow Rate: * 0.1-3.5 SCFH Exchange : 3" - 5" Exchange Flow Rate: ** 60 SCFM/3600 SCFH Exchange Time: 1 Minute/15 ft 3 System Supply Port: 1/2" FPT Supply Fitting: 1/2" FPT Reference Fitting: 1/4" Tube Fitting EPCU Conduit Port Size: 1/2" FPT EPCU Power Requirements: 120 VAC 60 Hz 1Ø (European 220 voltage only) 240 VAC 50 Hz 1Ø (All voltage ratings are factory set) EPCU Power Consumption: 500 ma Power Contacts: 20 A @ 240 VAC 20 A @ 28 VDC *** 20 A @ 48 VDC Alarm N.O. Contact: 20 A @ 240 VAC 20 A @ 28 VDC Alarm N.C. Contact: 15 A @ 240 VAC 10 A @ 28 VDC * integrity determines actual flow rate ** With regulator set to 80 psi min. during exchange EPCU Description Lexan is a registered trademark of the General Electric Corporation Simplified EPCU Logic Diagram OPERATION Signal (1) from SPS is sent to µp, GAL and SPCR coil. During start-up, GAL verifies all µp functions. GAL & µp must receive uninterrupted signal from SPS to prevent logic resetting. After GAL verifies all start-up procedures, it sends "power enabled" signal (2) to PER coil. Then, µp sends "power request" signal (3) through the SPCR and PER contacts to EPR coils. SPS (1) GAL CLK FAIL PRC µp (2) PER SPCR (3) Electrical Wiring Diagram Field Wired Power Module Terminals EPR EPR SPS - Safe GAL - Gate Array Logic µp - Microprocessor PER - Power Enabled SPCR - Safe pressure confirmation relay EPR - Power 20 A FUSES Isolated Power s Isolated Alarm 1 2 3 4 5 6 7 8 9 10 The Pepperl+Fuchs Series EPCU is a factory programmed, field adjustable, microprocessor controlled unit featuring full status indication, redundant gate array logic and electromechanical relays. The EPCU is constructed from four major items: (1) a power module, (2) a pressure switch module, (3) a logic module and (4) a power mode selector switch. The sections are linked with polarized cable, and the boards are stacked in the EPCU enclosure on standoffs. Basic EPCU Operation When power is "off", the EPCU is at rest, alarm and power relays are deenergized, and the LED display is off. When power is switched "on", the EPCU performs a self-test of LED display and logic functions. The unit will then start-up. Class I units must detect a 0.25" pressure to energize the alarm relay and begin an exchange cycle. When the cycle stops, the power relays will energize. Loss of safe pressure on either unit causes alarm and power relays to deenergize (see power control options for more information regarding EPCU operation). EPCU Power Supply Terminals 120 VAC 240 VAC (Optional Voltage) Gnd Gnd Hot Hot Neu Neu In Out In Out Power Supply NO Com NC Terminals Remote Alarm Terminals 28

Barrier Fault & Active Status Indicators Barrier C Barrier B Barrier A Barrier Wiring Terminal Calibration Access EPCU Logic Module Primary Microprocessor LED Status Display Controller (GAL) Factory Programming Power Module Cable EDT, SLT & RET Timers EPCU Features LED DISPLAY INDICATORS Power Off: Red Power s Deenergized Power On: Green Power s Energized Safe : Blue > 0.15" w.c. Rapid Exchange: Blue > 2.0" w.c. Timer Running: Yellow Rapid Exchange Timer Active Alarm Active: Red < 0.15" w.c. Bypass Engaged: Green Control Bypass Active - CB EPCU Module Primary Safe Space for Optional Safe Isolated Coil Voltage Transformer Voltage Input Selector (factory set for 120 or 240 VAC power) Input Fuse RESV RESV Factory Wiring Terminal 120/240 VAC EPCU Power Module 20 A Power Fuse Power Control Cable Power Module Wiring Terminal Assembled Electrical Power Control Unit Primary Rapid Exchange Space for Optional Rapid Exchange Voltage Regulators Cable Logic Module Cable Safe Rapid Exchange 20 A Alarm 20 A Power s Alarm Only Alarm & Bypass FIELD ADJUSTABLE TIMER FUNCTIONS EDT (Exchange Delay Timer) (FA Style only) provides a time delay to prevent Rapid Exchange solenoid valve from energizing until safe pressure can be stabilized. SLT (Solenoid Latching Timer) (FA Style only) provides a time delay to keep the Rapid Exchange solenoid valve energized until exchange pressure is detected. If the pressure is not detected, the EPCU will reset. RET (Rapid Exchange Timer) provides a time delay after Rapid Exchange pressure is detected, to allow four volume exchanges prior to energizing the enclosure power relays. If safe pressure or Rapid Exchange pressure is lost or interrupted during time delay cycle, the EPCU will reset. Power Control Options NORMAL RUNNING (NR) MODE EPCU features an on-off pushbutton power control switch to activate control functions. must be depressed to initiate start-up. After completion of start-up, safe pressure must be lost or switch must be depressed to deenergize enclosure power relays. CONDITIONAL BYPASS (CB) MODE EPCU features an off-on-bypass power control switch to activate control functions. must be set to "on" position to initiate start-up. After enclosure power is energized, safe pressure must be lost or switch must be set to "off" position to deenergize enclosure power. After enclosure power is energized, switch may be set to "bypass" position to temporarily latch enclosure power relays. A flashing LED then indicates bypass engaged, and the enclosure can be accessed without deenergizing power (performed under specific conditions). Following access, safe pressure must be reestablished to resume normal operation. At that time, the switch may be reset to the "on" position without disruption of enclosure power. Alarm relay normally deenergizes only upon loss of safe pressure, but can be programmed to deenergize when bypass is engaged, if specified at time of order. 29

System Accessories Diagram Model Number Designations Supply Inlet Fitting 1/2" Supply Pipe 1/4" Tubing Reference Supply Fitting EPC-10 Reference Fitting EFC-4 Protection Vent EPV-5-SA... Pressurized Protected Mounting Kit SMK-3 Warning Nameplate EWN-1 (Included with Panel) OPTIONAL INTRINSIC SAFETY BARRIERS DESCRIPTION & OPERATION The EPCU Logic Module can accommodate up to three intrinsic safety barriers to interact with remote devices and affect operation of the EPCU. The barriers are installed and programmed by the factory at time of order, and they are designed to function either in conjunction with a customer furnished switch and a Pepperl+Fuchs furnished resistor network cable, or a Pepperl+Fuchs furnished proximity detector. Each barrier develops a low power signal to create a two-wire closed-loop circuit. Operational status of each barrier is indicated by a green LED to show active (closed switch) status, and by a red LED to show faulted (line breakage) cable status. All barriers can be reprogrammed to duplicate other barrier functions as required, upon specific request. 2005 - STD - CI - NR - LH - ## Series Model Number System Style STD - Standard SA - Semiautomatic FA - Fully Automatic Area Classification CI - Class I, Group C & D Area IB - Class I, Group B Area (STD Only) Power Control Mode NR - Normal Running CB - Conditional Bypass Mounting Configuration LH - left hand left side of enclosure RH - right hand right side of enclosure TM - top mount top of enclosure BM - bottom mount bottom of enclosure WM - wall mount wall surface FM* - frame mount external frame or rack PM* - panel mount enclosure surface cutout * FM & PM configurations feature flush mount EPCU. Flush mount EPCU is not suitable for Group B Area. ## - See Accessories Page 132 for additional factory installed accessories BARRIER PROGRAMMING OPTIONS Barrier A Function - when switch opens Disables start-up cycle Deenergizes enclosure power and alarm relay Functions parallel to safe pressure switch Barrier B Function - when switch opens Not programmed - custom applications only Barrier C Function - when switch closes Energizes RESV relay - custom applications only Model 2005 System Accessories (See accessories page for complete details) CONNECTION FITTINGS EFC-4 1/4" Flush Connector EPC-10 1/2" Pipe Connector ADDITIONAL ITEMS SMK-2, -3 or -10 System Mounting Kit RAH Remote Alarm Horn RAB-1 Div. 1 Remote Alarm Beacon LCK L Fitting Conduit Kit TCK T Fitting Conduit Kit SRM-4000 Resistor Module NJ... P+F Namur Sensor INSTALLATION & OPERATION MANUAL 129-0214 Inst. & Operation Manual ENCLOSURE PROTECTION VENTS ONE VENT REQUIRED WITH EACH SYSTEM EPV-5-SA-00 Straight w/spark Arrestor EPV-5-SA-90 Rt Angle w/spark Arrestor WARNING NAMEPLATES EWN-1 Class I Warning ETW Temperature Warning FACTORY INSTALLED ACCESSORIES IS1 Channel A Barrier IS2* Channel B Barrier IS3* Channel C Barrier RP1 Safe RP2 Rapid Exchange L Power Key Lock Assembly *Requires custom programming information ONE (1) ENCLOSURE WARNING NAMEPLATE & ONE (1) INSTALLATION & OPERATION MANUAL ARE PROVIDED WITH EACH SYSTEM Overall System Dimensions STD / SA & FA Height Width Depth LH - left hand 25 13.50 10.75 / 15.25 RH - right hand 25 13.50 10.75 / 15.25 TM - top mount 14 25 10.75 / 15.25 BM - bottom mount 14 25 10.75 / 15.25 WM - wall mount 25 13.50 12.50 / 16.50 FM or PM - flat panel Dimensions in inches. Mounting dimensions available upon request. FM & PM panel cutout dimensions: 26h x 14.50w Height & width dimensions reflect mounting plate measurements. Depth dimension reflects overall measurement of system, including components. 27 15.50 11.25 / 15.75 30

Series Model Number Designations and Accessories Guide - - - - - - - - - Pepperl+Fuchs supplies purge/pressurization systems custom built to your specifications. To ensure the integrity of your system, certain accessory items must be factory installed. The Model Number and Accessories Guide identifies those parts that must be included on your purge/pressurization system order. Series Model Number 2001A, 2001B, 2001C, 2002, 2003, 2004, 2005 System Style STD - Standard SA - Semiautomatic FA - Fully Automatic Area Classification CI - Class I, Group C & D Area CII - Class II, Group E, F & G Area IB - Class I, Group B Area (STD Only) Power Control Mode NR - Normal Running CB - Conditional Bypass Mounting Configuration LH - Left hand (left side of enclosure) RH - Right hand (right side of enclosure) TM - Top mount (top of enclosure) BM - Bottom mount (bottom of enclosure) WM - Wall mount (wall surface) FM* - Frame mount (external frame or rack) PM* - Panel mount (enclosure surface cutout) * FM & PM configurations feature flush mount EPCU. Flush mount EPCU is not suitable for Group B Area. Cooler Indicator Gauge (see page 97) VX - Vortex Key Lock Assembly (see page 113) L - Key Lock Assembly Intrinsic Safe Barrier (see page 112) IS1 - IS Barrier, Channel A Barrier IS2 - IS Barrier, Channel B Barrier IS3 - IS Barrier, Channel C Barrier IS4 - IS Barrier, Channels A and B Barrier IS5 - IS Barrier, Channels B and C Barrier IS6 - IS Barrier, Channels A and C Barrier IS7 - IS Barrier, All Channels Barrier es (see page 113) RP1 - Safe es RP2 - Rapid Exchange es RP3 - Both es Voltage 24 VDC - Voltage Direct Currents 240 VAC - Voltage Alternating Currents 31

Indicator Gauge Description The cooler indicator gauge, sometimes called the Vortex indicator gauge, is used on systems were there is cooling required after purging. Normally after the purging cycle, there is a small flow of protective gas required to compensate for leakages, and to keep a constant pressure within the enclosure so that the ingress of hazardous atmosphere cannot get inside the enclosure. This is known as pressurization. If the equipment inside the pressurized enclosure requires cooling, either a higher flow rate of protective gas is required through the pressurization valve, or a second source of cooling gas is introduced into the enclosure. The standard differential pressure gauge will indicate pressurization only up to 0.5 inches (13 mm) water, which may not be enough for cooling indication. The cooler indicator gauge is installed onto the pressurization/purge panel, and allows monitoring of the system during normal operation of the purge/pressurization system. Cooler Indicator Gauge Cooler Indicator Gauge (Vortex Indicator Gauge) Special Note TO order purge/pressurization units equipped with a Cooler indication gauge, specify VX in the Model Number Designation. Specifications OPERATING RANGE Full range: 0 to 5 " (0 to 127 mm) water Low range red: 0 to 0.5 " (0 to 13 mm) water Safe range green: 0.5 to 1.5 " (13 to 38 mm) water Cooler/Rapid exchange range yellow: 1.5 to 4.5 " (38 to 114 mm) water High range red: 4.5 to 5 " (114 to 127 mm) water Cover: Housing: BODY COMPONENTS acrylic die cast aluminum coated to withstand 168 hour salt spray corrosion test TECHNICAL DATA Maximum overload pressure: 15 psig Accuracy: ± 2% of full scale Weight: 1.2 lb (510 g) Process connection: 1/8 Female NPT duplicate high and low pressure taps, one pair side, one pair back 32

process automation protecting your process For over a half century, Pepperl+Fuchs has provided new concepts for the world of process automation. Our company sets standards in quality and innovative technology. We develop, produce and distribute electronic interface modules, Human-Machine Interfaces and hazardous location protection equipment on a global scale, meeting the most demanding needs of industry. Resulting from our world-wide presence and our high flexibility in production and customer service, we are able to offer complete individual solutions wherever and whenever you need us. We are the recognized experts in our technologies Pepperl+Fuchs has earned a strong reputation by supplying the world s largest process industry companies with the broadest line of proven components for a diverse range of applications. 6 5 3 1 7 4 1 2 Worldwide/German Headquarters Pepperl+Fuchs GmbH Mannheim Germany Tel. +49 621 776 2222 E-Mail: pa-info@de.pepperl-fuchs.com Asia Pacific Headquarters Pepperl+Fuchs PTE Ltd. Singapore Company Registration No. 199003130E Tel. +65 6779 9091 E-Mail: pa-info@sg.pepperl-fuchs.com 8 2 3 4 5 Central/Western Europe & Africa Headquarters Pepperl+Fuchs N.V. Schoten/Antwerp Belgium Tel. +32 3 6442500 E-Mail: pa-info@be.pepperl-fuchs.com Middle East Headquarters Pepperl+Fuchs M.E (FZE) Dubai UAE Tel. +971 4 883 8378 E-Mail: pa-info@ae.pepperl-fuchs.com North/Central America Headquarters Pepperl+Fuchs Inc. Twinsburg Ohio USA Tel. +1 330 486 0002 E-Mail: pa-info@us.pepperl-fuchs.com Northern Europe Headquarters Pepperl+Fuchs GB Ltd. Oldham England Tel. +44 161 6336431 E-Mail: pa-info@gb.pepperl-fuchs.com www.pepperl-fuchs.com 6 7 8 Southern/Eastern Europe Headquarters Pepperl+Fuchs Elcon srl Sulbiate Italy Tel. +39 039 62921 E-Mail: pa-info@it.pepperl-fuchs.com Southern America Headquarters Pepperl+Fuchs Ltda. São Bernado do Campo SP Brazil Tel. +55 11 4341 8448 E-Mail: pa-info@br.pepperl-fuchs.com Subject to modifications 2010 PEPPERL+FUCHS, INC. Printed in USA Part No. TDOCT-B062_USA